Burnishing-machine.



G. P. STAGKPOLE.

BURNISHING MACHINE.

APPLICATION FILED MAY 20, 1913.

1, 1 1 6,856, Patented Nov. 10, 1914.

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THE NORRIS PETERS C04, PHOTO-LITHO., WASHINGTON, D. (5.

UNITED STATES PATENT OFFICE.

CHARLES F. STACKPOLE, OF LYNN, MASSACHUSETTS, ASSIGNOR 0F ONE-HALF TO ALFRED I-I. HOWARD, OF BOSTON, MASSACHUSETTS.

BURNISHING-MACI-IINE.

Specification of Letters Patent.

Patented Nov. 10, 1914.

Application filed May 20, 1913. Serial No. 768,765.

T all whom it may concern:

Be it known that I, CHARLES F. STA0K- POLE, a citizen of the United States, residing atLynn, in the county of Essex, State of Massachusetts, have invented a certain new and useful Improvement in Burnishing-Machines, of which the following is a specification, reference beinghad therein to the accompanying drawings.

The invention is more especially designed for use in burnishing machines employed in the manufacture of boots andshoes, and has reference to means for determining the extent of theturning movement or play of a burnishing tool uponthe supporting-pin or spindle upon which it is mounted on a tool-carrier. q

In burnishing machines which operate upon the edges of the fore-parts and shanks of the soles of shoes, the burnishing tools usually are socketed to fit upon pins or spindles projecting from a vibrating tool-, carrier. For the purpose of keeping the tools in place upon the said pins or spindles the shank of a tool is formed with a notch in the outer side thereof, andthe tool-carrier is provided with a leaf-spring having a bent end to enter the said notch when the tool is slipped upon the pin or spindle. The said leaf-spring constitutes a retainer or latch for holding the tool in place upon the pin or spindle. The bent portion of the spring occupies the notch quite loosely, because it is necessary that the tool should have capacity for free turning play or swiveling movement, so as to enable it to accommodate itself, during the rapid vibratory movements of the tool-carrier and the tool, to the varying curvature of the sole that is operated upon, while the Work is being moved along rapidly by the operator. In common practice, the extent or range of the turning play or swiveling movement is determined by means of a so-called keeperpin entering a slot'in the upper portion of .the shank of the tool, the width of the slot being greater than the diameter of the pin, to permit the play. The keeper-pin and slot have practical drawbacks and disadvantages, and are undesirable features. The keeper-pin becomes injured and I at times bro-ken by the effects of the'turning play or swiveling movement of the tool. The extent of the bearing provided by the walls of the-socket and the tool is reduced by the-slot.

. Letters Patent N 0. 1,041,692,

Theinvention dispenses with the keeperpin, and renders the slot in the shank of the tool unnecessary.

Itconsists in the combination with a hollow-shanked sole-edge burnishing tool presentmg a fiat outer surface or surfaces, of an external keeper or check in the form of a stlif piece of metal projecting alongside the supporting-pin or spindle and occupying such a position that when the tool is slipped on to the said supporting-pin or spindle a flat portion of the tool occupies a position adjacent the keeper, or check, With a slight space between. j

In operatiomthe turning movement of the side-corners or shoulders of the said flat portion against the keeper or check. By dispensing with the slot in the tool-shank a better and more complete bearing is secured. The drawings'show a portion of'a burnishing machine embodying the means of supporting and operating the tool-carrier which is described and claimed in my U. S.

granted October 15, 1912.

In the drawings, Figure 1 shows in front elevation the upper portion, or head, of the said edge-burnishing machine with embodiments of the invention applied thereto, the

top part of the tool-carrier being broken j away. Fig. 2 shows in partly sectional sideelevation thetool-carrying arm, the toolstock, tools mounted upon the said toolstoc'k, and the said embodiments of the invention. Figs. 3 and 4 are detail views" in section on line 3, 3, of Fig. 2, showing different positions of a tool, these views being projected from Fig. 2. Fig. 5 is aside elevation of a tool-carrier and tools applied thereto, with both of. the retainer-springs and keepers likethose'at the right in Fig. 2, but with a. different shape of tool at the left, in Fig. 5. Fig. dis a view similar to F ig. 5, showing another embodiment of the: invention. Fig. 7 is a bottom view, of the double keeper or check of Fig. 6, drawn as a projection from Fig. 6. Fig. 8 is a view similar to Fig. 5, showing another'embodiment. Fig. 9 is a top end View of the right hand tool in Fig. 8, shown as a projection from the latter figure. 1

Having reference tothe drawings, in Fig. 1 the head of the supporting-frame of a burnishing machine is shown at 1, and 2 isa vibration.

' required extent rotary shaft which is mounted in the said head in bearings applied to the latter.

In Figs. 1 and 2, l is the tool-carrying arm. 7 is a tool-stock mounted in said arm and provided with two projecting pins 7 7 on which two tools 5, 5, are mounted. The said tool-stock is mounted rotatably in the said arm 4 so as to enable it to be turned from time to time when desired, so as to present either tool in working position, and is locked in well-known manner in either of the two positions of rotary adjustment.

In practice, as previously mentioned, the

socketed portions of the tools fit loosely upon the supporting-pins or spindles 7 7, so that the tools may turn or swivel freely upon the said pins or spindles, and the shank of each of the tools has formed therein a notch 5 to receive the bent engaging end of a re tainer for holding the tool upon the supporting-pin or spindle upon which it is mounted. Retainingor latching springs of usual form are shown at 7 at the right in Fig. 2, and in Figs. 3 to 6, and modified forms are shown in Fig. 1, at the left in Fig. 2, and in Fig. 7, as presently will be described. Fig. 2 of the drawings shows at the right therein a tool having a shank and socket of the proportionate length heretofore customary. It also shows at the left a tool having a shank and socket of considerably increased length, which is preferable. The shankbearing at the right in Fig. 2 is not suitable for the heavy irons required for operating upon heavy or thick edges when the machine is operated at a high speed of oscillation or The shank-bearing is too short for so much metal as is required foroperating upon thick-edged work. The longer shank-bearing at the left in Fig. 2 is better suited in the case of irons employed for such work. In the case of each of the tools of Fig. 2 the upper end of the shank is flatted transversely at the outer side thereof, as clearly represented in Figs. 3 and 4, forming a flat face and laterally opposite corners or shoulders for cooperation with the check.

At the right in Fig. 2 the check is is a short piece of stiff material secured in position under the retaining spring 7 by means of the same screw, 8, that engages with the upper end of the said spring. The lower end of the check is is bent and rounded, as shown, to facilitate the operation of sliding the flattened portion of the tool-shank into place alongside the said bent end of the check, between the supporting-pin or spindle and the check, such bent end being the engaging portion of the check. There is sufficient play or looseness between the fiat face of the toolshank and the engaging portion of the check, asrepresented in Figs. 2 and 3, to permit the of turning movement of the tool upon the supporting-pin or spindle 7, as indicated in Fig.

l. The 'checkis sufii ciently stiff to enable it to arrest the said turning movement when the corner or projecting portion at either side ofthe flatted face of the tool-shank is carried against the engaging portion of the check by the turning movement, as in Fig.

At the left in Fig. 2 the tool-retaining spring? is made stiffer than usual, and it is bent in its upper portion, adjacent the place which is engaged by the securing screw 8, so as to provide for coacting of such bent upper portion with the iiatted upper end of the tool-shank in the same manner as check is coacts with the flatted portion of a tool. Thereby, the upper portion of the spring 7 closely adjacent that portion of the spring which is held against the lower end of the tool-stock by the screw .9, is causedto act as a check. Such portion of the spring is practically rigid and unyielding.

Fig. 5 shows tools having long and short shanks, respectively, and opposite checks 7c, is, both of the same construction, in enagement with the flatted upper portions of the tool-shanks. The flatted portion of the long tool-shank at th-eleft in Fig. 5 is longer than that of the short tool-shank at the right in the said figure.

Fig. 6 illustrates the emplovment of an inverted U-shaped piece constituting a double check, which is fastened by means of a screw 8 to the under side of the toolstock between the two supporting-pins or spindles 7, 7 the said piece being formed with downturned arms or wings 70 711 which extend alongside the flat outer side faces of the tool-heads. A bottom View of said double keeper is given in Fig. 7 The said tool-heads are rectangular in crosssection, as usual, and the respective arms or wings 70, k co-act with the flat sides of the tool-heads to limit the extent of the turning movement or play of the tools.

Fig. 8 illustrates the employment of an inverted U-shaped piece 76 constituting an other form of double check, which is attached by means of a screw 8 to the under side of the toolstock between the supporting-pins 0r spindles, with its downwardly projecting wings or arms positioned properly to co-act with the iatted faces of the tool-shanks. In this instance, the flatted faces are at the inner sides of the toolshanks. In this figure, the tools are held upon the supporting-pins or spindles by means of a double retaining or latchingspring, 7 7 having opposite engaging portions. This spring has its middle portion entered between the downturned wings or arms of the check 76 and engaged by the securing screw .9 and its opposite clownwardly-extendingportions enter the notches 5, 5, of the tool-shanks to retain the tools upon the supporting-pins or spindles. -Bythe employment ofcheck-devices on the order of those shown and described herein, I am enabled to form the tools of rectangular tool-stock, with the shankportions of the tools of rectangular shape in cross-section, or in substantially that shape, when desired, as in Fig. 9 and at the right in Fig. 8. This enables me to. dispense with the turning operation, and With a subsequent flatting operation, because the.

fiat sides of the shank will furnish the required flat faces for cooperation with the stilf checks. The tool-shanks in Figs. 1 to 6 are turned. That at the left in Fig. 8 is cylindrical in its lower portion, and partly cylindrical in its upper portion.

It will be understood that it is through the cooperation of the relatively outstanding or prominent side-portions, shoulders, corners, or angles, of the flatted portions of the tools with the checks that the extent of the turning movement or play of the tools is determined, and it therefore will be obvious that the shapes of the checks and of the portions of the tools which cooperate with the checks may vary without involving departure from the principles of the invention.

I claim as my invention,-

' 1. In a burnishing machine, a vibrating tool-carrier having a tool-supporting spindle, a sole-edge burnishing tool socketed to fit upon said spindle and having a trans versely flatted face, and an external checkdevice occupying a position adjacent said face but separated from the latter by a slight space permitting a limited amount of swinging movement, said check-device by its engagement with the shoulders at opposite sides of the said face limiting the extent of such movement.

2. For shoe-sole-edge burnishing machines, such as are provided to reciprocate or oscillate burnishing tools, in combination, a vibrator spindle, a holloW-shanked burnishing tool, fitted to turn freely upon said spindle, said burnishing tool presenting a flatted outer surface, and a check-device adjacent to said surface, properly locatedto cooperate therewith to limit or control the turning movement of the tool on its spindle.

In testimony whereof I afiix my signature in presence of two witnesses.

CHARLES F. STAOKPOLE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner ot'ratents,

Washington, D. 0. 

